lib/librte_eal/bsdapp/eal/eal_memory.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #include <sys/mman.h>
  34 #include <unistd.h>
  35 #include <sys/types.h>
  36 #include <sys/sysctl.h>
  37 #include <inttypes.h>
  38 #include <fcntl.h>
  39
  40 #include <rte_eal.h>
  41 #include <rte_eal_memconfig.h>
  42 #include <rte_log.h>
  43 #include <rte_string_fns.h>
  44 #include "eal_private.h"
  45 #include "eal_internal_cfg.h"
  46 #include "eal_filesystem.h"
  47
  48 #define PAGE_SIZE (sysconf(_SC_PAGESIZE))
  49
  50 static int
  51 rte_eal_contigmem_init(void)
  52 {
  53         struct rte_mem_config *mcfg;
  54         uint64_t total_mem = 0;
  55         void *addr;
  56         unsigned i, j, seg_idx = 0;
  57
  58         /* get pointer to global configuration */
  59         mcfg = rte_eal_get_configuration()->mem_config;
  60
  61         /* for debug purposes, hugetlbfs can be disabled */
  62         if (internal_config.no_hugetlbfs) {
  63                 addr = malloc(internal_config.memory);
  64                 mcfg->memseg[0].phys_addr = (phys_addr_t)(uintptr_t)addr;
  65                 mcfg->memseg[0].addr = addr;
  66                 mcfg->memseg[0].len = internal_config.memory;
  67                 mcfg->memseg[0].socket_id = 0;
  68                 return 0;
  69         }
  70
  71         /* map all hugepages and sort them */
  72         for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
  73                 struct hugepage_info *hpi;
  74
  75                 hpi = &internal_config.hugepage_info[i];
  76                 for (j = 0; j < hpi->num_pages[0]; j++) {
  77                         struct rte_memseg *seg;
  78                         uint64_t physaddr;
  79                         int error;
  80                         size_t sysctl_size = sizeof(physaddr);
  81                         char physaddr_str[64];
  82
  83                         addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
  84                                         MAP_SHARED, hpi->lock_descriptor, j * PAGE_SIZE);
  85                         if (addr == MAP_FAILED) {
  86                                 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
  87                                                 j, hpi->hugedir);
  88                                 return -1;
  89                         }
  90
  91                         rte_snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
  92                                         ".physaddr.%d", j);
  93                         error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
  94                                         NULL, 0);
  95                         if (error < 0) {
  96                                 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
  97                                                 "from %s\n", j, hpi->hugedir);
  98                                 return -1;
  99                         }
 100
 101                         seg = &mcfg->memseg[seg_idx++];
 102                         seg->addr = addr;
 103                         seg->phys_addr = physaddr;
 104                         seg->hugepage_sz = hpi->hugepage_sz;
 105                         seg->len = hpi->hugepage_sz;
 106                         seg->nchannel = mcfg->nchannel;
 107                         seg->nrank = mcfg->nrank;
 108                         seg->socket_id = 0;
 109
 110                         RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
 111                                         PRIx64", len %zu\n",
 112                                         seg_idx, addr, physaddr, hpi->hugepage_sz);
 113                         if (total_mem >= internal_config.memory ||
 114                                         seg_idx >= RTE_MAX_MEMSEG)
 115                                 break;
 116                 }
 117         }
 118         return 0;
 119 }
 120
 121 static int
 122 rte_eal_contigmem_attach(void)
 123 {
 124         const struct hugepage_info *hpi;
 125         int fd_hugepage_info, fd_hugepage = -1;
 126         unsigned i = 0;
 127         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
 128
 129         /* Obtain a file descriptor for hugepage_info */
 130         fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
 131         if (fd_hugepage_info < 0) {
 132                 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
 133                 return -1;
 134         }
 135
 136         /* Map the shared hugepage_info into the process address spaces */
 137         hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
 138                         fd_hugepage_info, 0);
 139         if (hpi == NULL) {
 140                 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
 141                 goto error;
 142         }
 143
 144         /* Obtain a file descriptor for contiguous memory */
 145         fd_hugepage = open(hpi->hugedir, O_RDWR);
 146         if (fd_hugepage < 0) {
 147                 RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
 148                 goto error;
 149         }
 150
 151         /* Map the contiguous memory into each memory segment */
 152         for (i = 0; i < hpi->num_pages[0]; i++) {
 153
 154                 void *addr;
 155                 struct rte_memseg *seg = &mcfg->memseg[i];
 156
 157                 addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
 158                                 MAP_SHARED|MAP_FIXED, fd_hugepage, i * PAGE_SIZE);
 159                 if (addr == MAP_FAILED || addr != seg->addr) {
 160                         RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
 161                                 i, hpi->hugedir);
 162                         goto error;
 163                 }
 164
 165         }
 166
 167         /* hugepage_info is no longer required */
 168         munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
 169         close(fd_hugepage_info);
 170         close(fd_hugepage);
 171         return 0;
 172
 173 error:
 174         if (fd_hugepage_info >= 0)
 175                 close(fd_hugepage_info);
 176         if (fd_hugepage >= 0)
 177                 close(fd_hugepage);
 178         return -1;
 179 }
 180
 181
 182 static int
 183 rte_eal_memdevice_init(void)
 184 {
 185         struct rte_config *config;
 186
 187         if (rte_eal_process_type() == RTE_PROC_SECONDARY)
 188                 return 0;
 189
 190         config = rte_eal_get_configuration();
 191         config->mem_config->nchannel = internal_config.force_nchannel;
 192         config->mem_config->nrank = internal_config.force_nrank;
 193
 194         return 0;
 195 }
 196
 197 /* init memory subsystem */
 198 int
 199 rte_eal_memory_init(void)
 200 {
 201         RTE_LOG(INFO, EAL, "Setting up physically contiguous memory...\n");
 202         const int retval = rte_eal_process_type() == RTE_PROC_PRIMARY ?
 203                         rte_eal_contigmem_init() :
 204                         rte_eal_contigmem_attach();
 205         if (retval < 0)
 206                 return -1;
 207
 208         if (internal_config.no_shconf == 0 && rte_eal_memdevice_init() < 0)
 209                 return -1;
 210
 211         return 0;
 212 }